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1.
Coordination Chemistry of P‐rich Phosphanes and Silylphosphanes. XXIV. Formation and Structure of [μ‐(1,2 : 2‐η‐ tBu 2P–P){Mo(CO) 2cp′} 2] [cp′Mo(CO) 2] 2 (cp′ = C 5H 4tBu) reacts with tBu 2P–P=P(Me) tBu 2 to yield the compound [μ‐(1,2 : 2‐η‐ tBu 2P–P){Mo(CO) 2cp′} 2], which crystallizes in the space group P2 12 12 1 with a = 1202.42(7), b = 1552.48(8), and c = 1765.3(1) pm. 相似文献
2.
Heterobinuclear Complexes: Synthesis and X‐ray Crystal Structures of [RuRh(μ‐CO)(CO) 4(μ‐P tBu 2)( tBu 2PH)], [RuRh(μ‐CO)(CO) 3(μ‐P tBu 2)(μ‐Ph 2PCH 2PPh 2)], and [CoRh(CO) 4(μ‐H)(μ‐P tBu 2)( tBu 2PH)] [Ru 3Rh(CO) 7(μ 3‐H)(μ‐P tBu 2) 2( tBu 2PH)(μ‐Cl) 2] ( 2 ) yields by cluster degradation under CO pressure as main product the heterobinuclear complex [RuRh(μ‐CO)(CO) 4(μ‐P tBu 2)( tBu 2PH)] ( 4 ). The compound crystallizes in the orthorhombic space group Pcab with a = 15.6802(15), b = 28.953(3), c = 11.8419(19) Å and V = 5376.2(11) Å 3. The reaction of 4 with dppm (Ph 2PCH 2PPh 2) in THF at room temperature affords in good yields [RuRh(μ‐CO)(CO) 3(μ‐P tBu 2)(μ‐dppm)] ( 7 ). 7 crystallizes in the triclinic space group P 1 with a = 9.7503(19), b = 13.399(3), c = 15.823(3) Å and V = 1854.6 Å 3. Moreover single crystals of [CoRh(CO) 4(μ‐H)(μ‐P tBu 2)( tBu 2PH)] ( 9 ) could be obtained and the single‐crystal X‐ray structure analysis revealed that 9 crystallizes in the monoclinic space group P2 1/a with a = 11.611(2), b = 13.333(2), c = 18.186(3) Å and V = 2693.0(8) Å 3. 相似文献
3.
tBu 2P‐P=P(Me) tBu 2 reacts with [Fe 2(CO) 9] to give [μ‐(1, 2, 3:4‐η‐ tBu 2P 1‐P 2‐P 3‐P 4tBu 2){Fe(CO) 3}{Fe(CO) 4}] ( 1 ) and [ trans‐( tBu 2MeP) 2Fe(CO) 3]( 2 ). With [(η 2‐C 8H 14) 2Fe(CO) 3] in addition to [μ‐(1, 2, 3:4‐η‐ tBu 2P 1‐P 2‐P 3‐P 4tBu 2){Fe(CO) 2PMe tBu 2}‐{Fe(CO) 4}] ( 10 ) and 2 also [(μ‐P tBu 2){μ‐P‐Fe(CO) 3‐PMe tBu 2}‐{Fe(CO) 3} 2( Fe‐Fe)]( 9 ) is formed. 1 crystallizes in the monoclinic space group P2 1/ c with a = 875.0(2), b = 1073.2(2), c = 3162.6(6) pm and β = 94.64(3)?. 2 crystallizes in the monoclinic space group P2 1/ c with a = 1643.4(7), b = 1240.29(6), c = 2667.0(5) pm and β = 97.42(2)?. 9 crystallizes in the monoclinic space group P2 1/ n with a = 1407.5(5), b = 1649.7(5), c = 1557.9(16) pm and β = 112.87(2)?. 相似文献
4.
Complexes [Me 2SnL 2 ( I ), Me 3SnL ( II ), Et 2SnL 2 ( III ), n‐Bu 2SnL 2 ( IV ), n‐Bu 3SnL ( V ), n‐Oct 2SnL 2 ( VI )], where L is ( E)‐3‐furanyl‐2‐phenyl‐2‐propenoate, have been synthesized and structurally characterized by vibrational and NMR ( 1H, 13C and 119Sn) spectroscopic techniques in combination with mass spectrometric and elemental analyses. The IR data indicate that in both the di‐ and triorganotin(IV) carboxylates the ligand moiety COO acts as a bidentate group in the solid state. The 119Sn NMR spectroscopic data, 1J[ 119Sn, 13C] and 2J[ 119Sn, 1H], coupling constants show a four‐coordinated environment around the tin atom in triorganotin(IV) and five‐coordinated in diorganotin(IV) carboxylates in noncoordinating solvents. The complexes have been screened against bacteria, fungi, and brine‐shrimp larvae to assess their biological activity. © 2008 Wiley Periodicals, Inc. Heteroatom Chem 19:612–620, 2008; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/hc.20488 相似文献
5.
Polysulfonylamines. CXVI. Destructive Complexation of the Dimeric Diorganyltin(IV) Hydroxide [Me 2Sn(A)(μ‐OH)] 2 (HA = Benzene‐1,2‐disulfonimide): Formation and Structures of the Mononuclear Complexes [Me 2Sn(A) 2(OPPh 3) 2] and [Me 2Sn(phen) 2] 2⊕ · 2 A ⊖ · MeCN Destructive complexation of the dimeric hydroxide [Me 2Sn(A)(μ‐OH)] 2, where A ⊖ is deprotonated benzene‐1,2‐disulfonimide, with two equivalents of triphenylphosphine oxide or 1,10‐phenanthroline in hot MeCN produced, along with Me 2SnO and water, the novel coordination compounds [Me 2Sn(A) 2(OPPh 3) 2] ( 3 , triclinic, space group P 1) and [Me 2Sn(phen) 2] 2⊕ · 2 A ⊖ · MeCN ( 4 , monoclinic, P2 1/ c). In the uncharged all‐ trans octahedral complex 3 , the heteroligands are unidentally O‐bonded to the tin atom, which resides on a crystallographic centre of inversion [Sn–O(S) 227.4(2), Sn–O(P) 219.6(2) pm, cis‐angles in the range 87–93°; anionic ligand partially disordered over two equally populated sites for N, two S and non‐coordinating O atoms]. The cation occurring in the crystal of 4 has a severely distorted cis‐octahedral C 2N 4 coordination geometry around tin and represents the first authenticated example of a dicationic tin(IV) dichelate [R 2Sn(L–L′) 2] 2⊕ to adopt a cis‐structure [C–Sn–C 108.44(11)°]. The five‐membered chelate rings are nearly planar, with similar bite angles of the bidentate ligands, but unsymmetric Sn–N bond lengths, each of the longer bonds being trans to a methyl group [ring 1: N–Sn–N 71.24(7)°, Sn–N 226.81(19) and 237.5(2) pm; ring 2: 71.63(7)°, 228.0(2) and 232.20(19) pm]. In both structures, the bicyclic and effectively C S symmetric A ⊖ ions have their five‐membered rings distorted into an envelope conformation, with N atoms displaced by 28–43 pm from the corresponding C 6S 2 mean plane. 相似文献
6.
Weak Sn…I Interactions in the Crystal Structures of the Iodostannates [SnI 4] 2– and [SnI 3] – Iodostannate complexes can be crystallized from SnI 2 solutions in polar organic solvents by precipitation with large counterions. Thereby isolated anions as well as one, two or three‐dimensional polymeric anionic substructures are established, in which SnI 3– and SnI 42– groups are linked by weak Sn…I interactions. Examples are the iodostannates [Me 3N–(CH 2) 2–NMe 3][SnI 4] ( 1 ), (Ph 4P) 2[Sn 2I 6] ( 2 ), [Me 3N–(CH 2) 2–NMe 3][Sn 2I 6] ( 3 ), [Fe(dmf) 6][SnI 3] 2 ( 4 ) and (Pr 4N)[SnI 3] ( 5 ), which have been characterized by single crystal X‐ray diffraction. [Me 3N–(CH 2) 2–NMe 3][SnI 4] ( 1 ): a = 671.6(2), b = 1373.3(4), c = 2046.6(9) pm, V = 1887.7(11) · 10 6 pm 3, space group Pbcm;(Ph 4P) 2[Sn 2I 6] ( 2 ): a = 1168.05(6), b = 717.06(4), c = 3093.40(10) pm, β = 101.202(4)°, V = 2541.6(2) · 10 6 pm 3, space group P2 1/ n;[Me 3N–(CH 2) 2–NMe 3][Sn 2I 6] ( 3 ): a = 695.58(4), b = 1748.30(8), c = 987.12(5) pm, β = 92.789(6)°, V = 1199.00(11) · 10 6 pm 3, space group P2 1/ c;[Fe(dmf) 6][SnI 3] 2 ( 4 ): a = 884.99(8), b = 1019.04(8), c = 1218.20(8) pm, α = 92.715(7), β = 105.826(7), γ = 98.241(7), V = 1041.7(1) · 10 6 pm 3, space group P1;(Pr 4N)[SnI 3] ( 5 ): a = 912.6(2), b = 1205.1(2), c = 1885.4(3) pm, V = 2073.5(7) · 10 6 pm 3, space group P2 12 12 1. 相似文献
7.
Coordination Chemistry of P-rich Phosphanes and Silylphosphanes. XVI [1] Reactions of [g 2-{P–P tBu 2}Pt(PPh 3) 2] and [g 2-{P–P tBu 2}Pt(dppe)] with Metal Carbonyls. Formation of [g 2-{(CO) 5M · PP tBu 2}Pt(PPh 3) 2] (M = Cr, W) and [g 2-{(CO) 5Cr · PP tBu 2}Pt(dppe)] [η 2-{P–P tBu 2}Pt(PPh 3) 2] 4 reacts with M(CO) 5 · THF (M = Cr, W) by adding the M(CO) 5 group to the phosphinophosphinidene ligand yielding [η 2-{(CO) 5Cr · PP tBu 2}Pt(PPh 3) 2] 1 , or [η 2-{(CO) 5W · PP tBu 2}Pt(PPh 3) 2] 2 , respectively. Similarly, [η 2-{P–P tBu 2}Pt(dppe)] 5 yields [η 2-{(CO) 5Cr · PP tBu 2}Pt(dppe)] 3 . Compounds 1 , 2 and 3 are characterized by their 1H- and 31P-NMR spectra, for 2 and 3 also crystal structure determinations were performed. 2 crystallizes in the monoclinic space group P2 1/ n (no. 14) with a = 1422.7(1) pm, b = 1509.3(1) pm, c = 2262.4(2) pm, β = 103.669(9)°. 3 crystallizes in the triclinic space group P1 (no. 2) with a = 1064.55(9) pm, b = 1149.9(1) pm, c = 1693.2(1) pm, α = 88.020(8)°, β = 72.524(7)°, γ = 85.850(8)°. 相似文献
8.
Iodoplumbates with Tetra‐ and Penta‐coordinated Pb 2+ Ions In contrast to all known iodoplumbates with octahedrally coordinated Pb 2+ ions, square pyramidal geometry is observed in the iodoplumbate chains of (Pr 4N)[PbI 3] ( 1 ) and [Mg(dmf) 6][PbI 3] 2 ( 2 ), whereas the isolated anions in (Ph 4P) 2[Pb 2I 6] ( 3 ) and [Bu 3N–(CH 2) 3–NBu 3][PbI 4] ( 4 ) contain tetra‐coordinated lead atoms. (Pr 4N)[PbI 3] ( 1 ): a = 910.86(6), b = 1221.46(7), c = 1907.7(1) pm, V = 2122.5(2) · 10 6 pm 3, space group P2 12 12 1; [Mg(dmf) 6][PbI 3] 2 ( 2 ): a = 891.24(9), b = 1025.34(7), c = 1234.82(9) pm, α = 92.938(8), β = 106.457(8), γ = 98.100(7)°, V = 1066.4(2) · 10 6 pm 3, space group P1; (Ph 4P) 2[Pb 2I 6] ( 3 ): a = 1174.5(1), b = 722.29(7), c = 3104.8(4) pm, β = 100.50(1)°, V = 2589.8(5) · 10 6 pm 3, space group P2 1/ n; [Bu 3N–(CH 2) 3–NBu 3][PbI 4] ( 4 ): a = 2178.3(1), b = 1008.63(5), c = 1888.3(1) pm, β = 110.003(5)°, V = 3898.6(4) · 10 6 pm 3, space group P2/ c. 相似文献
9.
The reaction of ECl 3 ( E = Al, Ga) with two equivalentsof Li 2Me 2Si(NPh) 2 (in diethyl ether/ n‐hexane) leads to the formation of bis‐chelate complexes [Li(OEt 2) 3][ E{Me 2Si(NPh) 2} 2] ( E = Al ( 1 ), Ga ( 2 )). Compounds 1 and 2 crystallize isotypically in the monoclinic system with a = 1136.42(6), b = 3267.9(1), c = 1360.37(8) pm, β = 94.320(7)° for 1 and a = 1140.88(6), b = 3261.7(2), c = 1360.20(8) pm, β = 94.641(7)° for 2 . Both the compounds display a distorted tetrahedral coordination of the central metal atom to give a spirocyclic EN 4Si 2 core. The Al–N bond lengths are in the range of186.5–186.9 pm and for the Ga–N distances values between 192.3and 193.1 pm are observed. Treatment of InCl 3 with three equivalents of Li 2Me 2Si(NPh) 2 yields the tris‐chelate [{Li(OEt 2)} 3In{Me 2Si(NPh 2)} 3] 3 . Compound 3 crystallizes in the trigonal crystal system , space group R$\bar{3}$ c with a = 1852.4(1), and c = 3300.2(2) pm. The central indium atom is coordinated by threeMe 2Si(NPh) 22– ligands in a distorted octahedral arrangement withIn–N bond lengths of 230.8 pm. 相似文献
10.
Four binary lanthanum stannides close to the 1:1 ratio of Sn:La were synthesized from mixtures of the elements. The structures of the compounds have been determined by means of single‐crystal X‐ray data. The low temperature (α) form of LaSn (CrB‐type, orthorhombic, space group Cmcm, a = 476.33(6), b = 1191.1(2), c = 440.89(6) pm, Z = 4, R1 = 0.0247), crystallizes with the CrB‐type. The structure exhibits planar tin zigzag chains with a Sn–Sn bond length of 299.1 pm. In contrast to the electron precise Zintl compounds of the alkaline earth elements, additional La–Sn bonding contributions become apparent from the results of band structure calculations. In the somewhat tin‐richer region, the new compound La 3Sn 4 (orthorhombic, space group Cmcm, a = 451.45(4), b = 1190.44(9), c = 1583.8(2) pm, Z = 4, R1 = 0.0674), crystallizing with the Er 3Ge 4 structure type, exhibits Sn 3 segments of the zigzag chains of α‐LaSn together with a further Sn atom in a square planar Sn coordination with increased Sn–Sn bond lengths. In the Lanthanum‐richer region, La 11Sn 10 (tetragonal, space group I4/ mmm, a = 1208.98(5), c = 1816.60(9) pm, Z = 4, R1 = 0.0325) forms the undistorted tetragonal Ho 11Ge 10 structure type. Its structure, which contains isolated Sn atoms, [Sn 2] dumbbells and planar [Sn 4] rings is related to the high temperature (β) form of LaSn. The structure of β‐LaSn (space group Cmmm, a = 1766.97(6), b = 1768.28(5), c = 1194.32(3) pm, Z = 60, R1 = 0.0453), which forms a singular structure type, can be derived from that of La 11Sn 10 by the removal of thin slabs. Due to the different stacking of the remaining layers, planar [Sn 4] chain segments and linear [Sn–Sn–Sn] anions are formed as additional structural elements. The chemical bonding (Sn–Sn covalent bonding, Sn–La contributions) is discussed on the basis of the simple Zintl concept and the results of FP‐LAPW calculations (density of states, band structure, valence electron densities and electron localization function). 相似文献
11.
Isotypic Borophosphates M II(C 2H 10N 2)[B 2P 3O 12(OH)] (M II = Mg, Mn, Fe, Ni, Cu, Zn): Compounds containing Tetrahedral Layers The isotypic compounds M II(C 2H 10N 2) · [B 2P 3O 12(OH)] (M II = Mg, Mn, Fe, Ni, Cu, Zn) were prepared under hydrothermal conditions (T = 170 °C) from mixtures of the metal chloride (chloride hydrate, resp.), Ethylenediamine, H 3BO 3 and H 3PO 4. The orthorhombic crystal structures ( Pbca, No. 61, Z = 8) were determined by X‐ray single crystal methods (Mg(C 2H 10N 2)[B 2P 3O 12(OH)]: a = 936.81(2) pm, b = 1221.86(3) pm, c = 2089.28(5) pm) and Rietveld‐methods (M II = Mn: a = 931.91(4) pm, b = 1234.26(4) pm, c = 2129.75(7) pm, Fe: a = 935.1(3) pm, b = 1224.8(3) pm, c = 2088.0(6) pm, Ni: a = 939.99(3) pm, b = 1221.29(3) pm, c = 2074.05(7) pm, Cu: a = 941.38(3) pm, b = 1198.02(3) pm, c = 2110.01(6) pm, Zn: a = 935.06(2) pm, b = 1221.33(2) pm, c = 2094.39(4) pm), respectively. The anionic part of the structure contains tetrahedral layers, consisting of three‐ and nine‐membered rings. The M II‐ions are in a distorted octahedral or tetragonal‐bipyramidal [4 + 2] (copper) coordination formed by oxygen functions of the tetrahedral layers. The resulting three‐dimensional structure contains channels running along [010]. Protonated Ethylenediamine ions are fixed within the channels by hydrogen bonds. 相似文献
12.
Two copper complexes [Cu(TTA) 2(4,4′‐azpy)] (1) and [Cu‐(TTA) 2(3,3′‐azpy)] (2) (HTTA = 1,1,1‐trifluoro‐3‐(2‐thenoyl)‐acetone, 4,4′‐azpy = 4,4′‐azobispyridine, 3,3′‐azpy = 3,3′‐azobispyridine) were synthesized and characterized. The crystal structures were determined by X‐ray diffraction analysis. The crystal 1 belongs to triclinic with space group P1 , a = 0.8515(2) nm, b = 0.9259(2) nm, c = 0.9468(2) nm, a = 66.126(9)°, β = 79.667(9)°, γ = 90.13(1)°, Z = 1, V = 0.6692(2) nm 3, Dc = 3.425 g/cm 3, γ = 2.113 mm ?1, F(000) = 694, R1 = 0.0594, wR2 = 0.1499. The crystal 2 belongs to monoclinic with space group P21/c, a = 1.0661(2) nm, b = 1.4296(3) ran, c = 1.0041(3) nm, β = 114.50(3)°, V = 1.3926(5) nm 3, Z = 2, Dc = 1.646 g/ cm 3, μ = 1.015 mm ?1, F(000) = 694, R1, = 0.0535, wR2 = 0.1113. In the crystals of complexes 1 and 2, the copper atoms have distorted octahedral symmetry. The two compounds possess very similar one‐dimensional linear chains linked through the rodlike 4,4′‐azpy ligands or 3,3′‐azpy ligands. 相似文献
13.
Well shaped single crystals of the equiatomic germanides YbPdGe and YbPtGe were synthesized from the elements using the Bridgman technique. The samples were investigated by X‐ray powder and single crystal diffraction: YbAuSn type, Imm2, a = 433.4(2), b = 2050.6(6), c = 752.6(2) pm, wR2 = 0.0723, 1551 F 2 values, 58 variables for YbPdGe and TiNiSi type, Pnma, a = 686.32(9), b = 430.47(9), c = 751.02(8) pm, wR2 = 0.0543, 379 F 2 values, 20 variables for YbPtGe. Both germanides crystallize with different superstructure variants of the KHg 2 type, resulting from different stacking of the puckered Pd 3Ge 3 and Pt 3Ge 3 hexagons. While only Pt–Ge interactions occur in the [PtGe] polyanionic network of YbPtGe, weak interlayer Pd–Pd (297 pm) and Ge–Ge (275 pm) interactions occur in YbPdGe. The crystal chemical peculiarities are discussed in the light of the different superstructure formed. 相似文献
14.
Preparation, Characterisation, and Crystal Structures of the Pseudohalogen Crown Ether Complexes [K([18]crown‐6)(X)(OPPh 3)] (X = N 3–, OCN – and SCN –) The potassium crown ether complexes [K([18]Crown‐6)(X)(OPPh 3)] (with X = N 3–, OCN – and SCN –) can be obtained by reaction of KX with 18‐crown‐6 (1, 4, 7, 10, 13, 16‐hexaoxacyclooctadecane and triphenylphosphane in THF exposed to UV light. All crown ether complexes were characterized by means of vibrational spectroscopy and X‐ray diffraction. They crystallize in the rhombic pointgroup R3m with three molecules in the unit cell: [K([18]crown‐6) (N 3)(OPPh 3)] ( 1 ): lattice constants at 293 K: a = b = 14.213(2) Å; c = 13.951(2) Å; R1 = 0.0249. [K([18]crown‐6)(OCN)(OPPh 3)] ( 2 ): a = b = 14.239(2) Å; c = 13.8927(14) Å; R1 = 0.0257. [K([18]crown‐6)(NCS)(OPPh 3)] ( 3 ): a = b = 14.339(2) Å; c = 14.266(2) Å; R1 = 0.0264. 相似文献
15.
Complexes of Monovalent Dibenzo‐18‐crown‐6 Cations with Triiodide as Anions The new polyiodides [NH 4(db18c6)] 2(I 3) 2 ( 1 ), [NH 4(db18c6)](db18c6)I 3 ( 2 ), [Na 1/2(db18c6)H 2O] 2I 3 ( 3 ), [Rb(db18c6)]I 3 ( 4 ), [Rb(db18c6)] 2(I 3) 2 ( 5 ), [Cs(db18c6)]I 3 ( 6 ), and [Cs 2(db18c6) 3][Cs(db18c6) 3/2](I 3) 3 ( 7 ) were obtained from reactions of dibenzo‐18‐crown‐6 (db18c6) and iodine with NH 4I, NaI, RbI, and CsI. Their crystal structures were determined by single‐crystal X‐ray diffraction. ( 1 ) M = NH 4, ( 5 ) M = Rb: monoclinic, P2 1/n, a = 1409,67(8), b = 2211,63(14), c = 1627,16(10) pm, β = 101,030(5)°, Z = 4 (crystal data for M = NH 4); ( 2 ): monoclinic, Pn, a = 1345,26(14), b = 773,82(4), c = 2095,10(20) pm, β = 94,439(8)°, Z = 2; ( 3 ): orthorhombic, Pnaa, a = 931,59(13), b = 2213,3(5), c = 2223,9(4) pm, Z = 4; ( 4 ): monoclinic, P2 1/n, a = 999,50(6), b = 1711,33(10), c = 1517,45(9) pm, β = 99,021(5)°, Z = 4; ( 6 ): triclinic, , a = 705,16(9), b = 1137,93(14), c = 1678,90(20) pm, α = 73,719(10), β = 79,782(10), γ = 83,669(10)°, Z = 2; ( 7 ): triclinic, , a = 1519,25(6), b = 1702,49(7), c = 2136,41(9) pm, α = 102,641(3), β = 101,989(3), γ = 91,911(3)°, Z = 2. 1 : 1 cations centered by M, [M(db18c6)] +, are found in the structures of ( 1 – 6 ). In contrast, the triple decker cation found in ( 7 ) is less common. The crystal structures are completed by mostly asymmetrically linear I 3? anions. 相似文献
16.
New intermetallic rare earth iridium silicides Sm 3Ir 2Si 2, HoIrSi, and YbIrSi were synthesized by reaction of the elements in sealed tantalum tubes in a high‐frequency furnace. The compounds were investigated by X‐ray diffraction both on powders and single crystals. HoIrSi and YbIrSi crystallize in a TiNiSi type structure, space group Pnma: a = 677.1(1), b = 417.37(6), c = 745.1(1) pm, wR2 = 0.0930, 340 F2 values for HoIrSi, and a = 667.2(2), b = 414.16(8), c = 742.8(2) pm, wR2 = 0.0370, 262 F2 values for YbIrSi with 20 parameters for each refinement. The iridium and silicon atoms build a three‐dimensional [IrSi] network in which the holmium(ytterbium) atoms are located in distorted hexagonal channels. Short Ir–Si distances (246–256 pm in YbIrSi) are indicative for strong Ir–Si bonding. Sm 3Ir 2Si 2 crystallizes in a site occupancy variant of the W 3CoB 3 type: Cmcm, a = 409.69(2), b = 1059.32(7), c = 1327.53(8) pm, wR2 = 0.0995, 383 F2 values and 27 variables. The Ir1, Ir2, and Si atoms occupy the Co, B2, and B1 positions of W 3CoB 3, leading to eight‐membered Ir 4Si 4 rings within the puckered two‐dimensional [IrSi] network. The Ir–Si distances range from 245 to 251 pm. The [IrSi] networks are separated by the samarium atoms. Chemical bonding in HoIrSi, YbIrSi, and Sm 3Ir 2Si 2 is briefly discussed. 相似文献
17.
Preparation and Structure of (3‐Methylpyridinium) 3[DyCl 6] and (3‐Methylpyridinium) 2[DyCl 5(Ethanol)] The complex chlorides (3‐Methylpyridinium) 3[DyCl 6] ( 1 ) and (3‐Methylpyridinium) 2[DyCl 5(Ethanol)] ( 2 ) have been prepared for the first time. The crystal structures have been determined from single crystal X‐ray diffraction data. 1 crystallizes in the trigonal space group R3 c ( Z = 36) with a = 2953.3(3) pm, b = 2953.3(3) pm and c = 3252.5(4) pm, compound 2 crystallizes in the triclinic space group P1 ( Z = 2) with a = 704.03(8) pm, b = 808.10(8) pm, c = 1937.0(2) pm, α = 77.94(1)°, β = 87.54(1)° and γ = 83.26(1)°. The structures contain isolated octahedral building units [DyCl 6] 3– and [DyCl 5(Ethanol)] 2–, respectively. 相似文献
18.
The stannides ErAgSn and TmAgSn have been investigated under high‐temperature (HT) and high‐pressure (HP) conditions in order to investigate their structural chemistry. ErAgSn and TmAgSn are dimorphic: normal‐pressure (NP) ErAgSn and HT‐TmAgSn crystallize into the NdPtSb type structure, P6 3mc, a = 466.3(1), c = 729.0(2) pm for NP‐ErAgSn and a = 465.4(1), c = 726.6(2) pm for HT‐TmAgSn. NP‐ErAgSn was obtained via arc‐melting of the elements and subsequent annealing at 970 K, while HT‐TmAgSn crystallized directly from the melt by rapidly quenching the arc‐melted sample. HT‐TmAgSn transforms to the ZrNiAl type low‐temperature modification upon annealing at 970 K. The high‐pressure (HP) modification of ErAgSn was synthesized under multianvil high‐pressure (11.5 GPa) high‐temperature (1420 K) conditions from NP‐ErAgSn: ZrNiAl type, , a = 728.7(2), c = 445.6(1) pm. The silver and tin atoms in NP‐ErAgSn and HT‐TmAgSn build up two‐dimensional, puckered [Ag 3Sn 3] networks (277 pm intralayer Ag–Sn distance in NP‐ErAgSn) that are charge‐balanced and separated by the erbium and thulium atoms. The fourth neighbor in the adjacent layer has a longer Ag–Sn distance of 298 pm. The [AgSn] network in HP‐ErAgSn is three‐dimensional. Each silver atom has four tin neighbors (281–285 pm Ag–Sn). The [AgSn] network leaves distorted hexagonal channels, which are filled with the erbium atoms. The crystal chemistry of the three phases is discussed. 相似文献
19.
Organotin(IV) O-butyl carbonodithioates [Me2SnL2], [Bu2SnL2], [Ph2SnL2], [Bu3SnL], and [Ph3SnL], where L = C4H9OCS
–2
, have been successfully synthesized and characterized by FT-IR, 1H and 13C NMR, and single crystal X-ray analysis. The ligand coordinates to the tin atom via the carbonodithioate group. According to the X-ray diffraction data, the tin atom in [Me2SnL2] has distorted tetrahedral geometry. The synthesized compounds were screened in vitro for antibacterial, antifungal, antileishmanial, cytotoxic, and protein kinase inhibitory activities. The complexes [Bu3SnL] and [Ph3SnL] exhibited the highest anti-leishmanial activity that exceeded the activity of the reference drug amphotericin B, probably by blocking the function of parasitic mitochondria due to which it restricts further growth of the organisms. The ligand and the complexes have been shown to bind to DNA via intercalative interactions resulting in hypochromic effect with a minor red shift as confirmed by UV-Vis spectroscopic studies. 相似文献
20.
Preparation and Structure of (2‐Methylpyridinium) 3[TbCl 6] and (2‐Methylpyridinium) 2[TbCl 5(1‐Butanol)] The complex chlorides (2‐Methylpyridinium) 3[TbCl 6] (1) and (2‐Methylpyridinium) 2[TbCl 5(1‐Butanol)] (2) have been prepared for the first time. The crystal structures have been determinated from single crystal X‐ray diffraction data. 1 crystallizes in the monoclinic space group C2/c ( Z = 8) with a = 3241,2(5) pm, b = 897,41(9) pm, c = 1774,2(2) pm and β = 97,83(2)°, 2 in the monoclinic space group P2 1/n ( Z = 4) with a = 1372,96(16) pm, b = 997,57(9) pm, c = 1820,5(2) pm and β = 108,75(1)°. The structures contain isolated octahedral building units [TbCl 6] 3– and [TbCl 5(1‐Butanol)] 2–, respectively. 相似文献
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